MIL-DTL-3661D
AIR
PRESSURE
15 PSIG
INDICATOR
ACTUATING DEVICE
LIGHT
(IF APPLICABLE)
NOTE: ENCLOSED INDICATOR LIGHTS SHALL HAVE AN OPENING IN THE BODY TO
SH9021
OBSERVE IF LEAKAGE OCCURS AROUND THE SEALED SHAFT AND BUSHING.
FIGURE 8. Seal test enclosure.
4.6.11.2 Dripproof. Specimens shall be subjected to the dripproof test of MIL-STD-108 with a five-gallon
quantity of water flowing over the specimen for a period of five minutes duration. The water stream shall be
directed within 12 inches above the test specimen.
4.6.12 Salt spray (corrosion) (see 3.5.11). Lampholders, indicator lights, indicator-light housings and
lenses shall be tested in accordance with method 101 of MIL-STD-202. The following details shall apply:
(a) Test-condition letter-A.
(b) All lampholders, indicator-light housings and lenses shall be tested individually with lamps installed in
either the lampholder or lens, whichever is applicable.
(1) Lampholders shall be suspended by the terminals so the open end of the holder is down.
(c) All indicator lights shall be tested with an applicable mating lens and a lamp installed. The indicator
lights shall be suspended in a horizontal position.
(d) After the test, the following examinations shall be made:
(1) All units shall be examined for corrosion of the base metal.
(2) Lenses shall be examined for visual discoloration.
(3) Lamps shall be removed from the specimens tested in 4.6.12 (b) and the inside of the socket or
lens shank shall be examined for corrosion.
(4) Lenses shall be capable of mating with the appropriate indicator-light housing.
(5) Specimens tested in 4.6.12 (c) shall be disassembled, relamped and assembled.
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